mirror of
https://github.com/sheumann/hush.git
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08a1b5095d
Very unreliable as e.g the ld check will see the flags supported by each emulation, not just the active one. good enough for now.. Fix would be to crate one or more dummy .c files and accually try if a flag works.
273 lines
9.0 KiB
Makefile
273 lines
9.0 KiB
Makefile
# Rules.make for busybox
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#
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# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
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#
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# Licensed under GPLv2, see the file LICENSE in this tarball for details.
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#
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# Pull in the user's busybox configuration
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ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
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-include $(top_builddir)/.config
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endif
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#--------------------------------------------------------
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PROG := busybox
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MAJOR_VERSION :=1
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MINOR_VERSION :=1
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SUBLEVEL_VERSION:=1
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EXTRAVERSION :=-pre0
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VERSION :=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL_VERSION)$(EXTRAVERSION)
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BUILDTIME := $(shell TZ=UTC date -u "+%Y.%m.%d-%H:%M%z")
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#--------------------------------------------------------
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# With a modern GNU make(1) (highly recommended, that's what all the
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# developers use), all of the following configuration values can be
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# overridden at the command line. For example:
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# make CROSS=powerpc-linux- top_srcdir="$HOME/busybox" PREFIX=/mnt/app
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#--------------------------------------------------------
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# If you are running a cross compiler, you will want to set 'CROSS'
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# to something more interesting... Target architecture is determined
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# by asking the CC compiler what arch it compiles things for, so unless
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# your compiler is broken, you should not need to specify TARGET_ARCH
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CROSS =$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
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CC = $(CROSS)gcc
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AR = $(CROSS)ar
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AS = $(CROSS)as
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LD = $(CROSS)ld
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NM = $(CROSS)nm
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STRIP = $(CROSS)strip
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CPP = $(CC) -E
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# MAKEFILES = $(top_builddir)/.config
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RM = rm
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RM_F = $(RM) -f
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LN = ln
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LN_S = $(LN) -s
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MKDIR = mkdir
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MKDIR_P = $(MKDIR) -p
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MV = mv
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CP = cp
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# What OS are you compiling busybox for? This allows you to include
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# OS specific things, syscall overrides, etc.
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TARGET_OS=linux
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# Select the compiler needed to build binaries for your development system
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HOSTCC = gcc
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HOSTCFLAGS= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
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LC_ALL:= C
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# If you want to add some simple compiler switches (like -march=i686),
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# especially from the command line, use this instead of CFLAGS directly.
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# For optimization overrides, it's better still to set OPTIMIZATION.
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CFLAGS_EXTRA=$(subst ",, $(strip $(EXTRA_CFLAGS_OPTIONS)))
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# To compile vs some other alternative libc, you may need to use/adjust
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# the following lines to meet your needs...
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#
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# If you are using Red Hat 6.x with the compatible RPMs (for developing under
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# Red Hat 5.x and glibc 2.0) uncomment the following. Be sure to read about
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# using the compatible RPMs (compat-*) at http://www.redhat.com !
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#LIBCDIR:=/usr/i386-glibc20-linux
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#
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# For other libraries, you are on your own. But these may (or may not) help...
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#LDFLAGS+=-nostdlib
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#LIBRARIES:=$(LIBCDIR)/lib/libc.a -lgcc
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#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) -funsigned-char
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#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
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WARNINGS=-Wall -Wstrict-prototypes -Wshadow
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CFLAGS+=-I$(top_builddir)/include -I$(top_srcdir)/include -I$(srcdir)
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ARFLAGS=cru
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# gcc centric. Perhaps fiddle with findstring gcc,$(CC) for the rest
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# get the CC MAJOR/MINOR version
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CC_MAJOR:=$(shell printf "%02d" $(shell echo __GNUC__ | $(CC) -E -xc - | tail -n 1))
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CC_MINOR:=$(shell printf "%02d" $(shell echo __GNUC_MINOR__ | $(CC) -E -xc - | tail -n 1))
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#--------------------------------------------------------
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export VERSION BUILDTIME HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
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ifeq ($(strip $(TARGET_ARCH)),)
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TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
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-e 's/i.86/i386/' \
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-e 's/sparc.*/sparc/' \
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-e 's/arm.*/arm/g' \
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-e 's/m68k.*/m68k/' \
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-e 's/ppc/powerpc/g' \
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-e 's/v850.*/v850/g' \
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-e 's/sh[234]/sh/' \
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-e 's/mips-.*/mips/' \
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-e 's/mipsel-.*/mipsel/' \
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-e 's/cris.*/cris/' \
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)
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endif
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# A nifty macro to make testing gcc features easier
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check_gcc=$(shell \
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if [ "$(1)" != "" ]; then \
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if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
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then echo "$(1)"; else echo "$(2)"; fi \
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fi)
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# A not very robust macro to check for available ld flags
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check_ld=$(shell \
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echo "checking='$(1)'" >> foo.txt ; \
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if [ "x$(1)" != "x" ]; then \
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$(LD) --help | grep -q \\$(1) && echo "-Wl,$(1)$(2)" ; \
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fi)
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# A not very robust macro to check for available as flags
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check_as=$(shell \
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if [ "x$(1)" != "x" ]; then \
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$(AS) --help | grep -q "\\$(1)" && echo "-Wa,$(1)$(2)" ; \
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fi)
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# Setup some shortcuts so that silent mode is silent like it should be
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ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
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export MAKE_IS_SILENT=n
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SECHO=@echo
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else
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export MAKE_IS_SILENT=y
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SECHO=-@false
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endif
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#CFLAGS+=$(call check_gcc,-funsigned-char,)
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CFLAGS+=$(call check_gcc,-mmax-stack-frame=256,)
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#--------------------------------------------------------
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# Arch specific compiler optimization stuff should go here.
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# Unless you want to override the defaults, do not set anything
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# for OPTIMIZATION...
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# use '-Os' optimization if available, else use -O2
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OPTIMIZATION:=$(call check_gcc,-Os,-O2)
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ifeq ($(CONFIG_BUILD_AT_ONCE),y)
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# gcc 2.95 exits with 0 for "unrecognized option"
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ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 3 ] ; echo $$?)),0)
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OPTIMIZATION+=$(call check_gcc,--combine,)
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endif
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OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
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PROG_CFLAGS+=$(call check_gcc,-fwhole-program,)
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endif # CONFIG_BUILD_AT_ONCE
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LIB_LDFLAGS:=$(call check_ld,--enable-new-dtags,)
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#LIB_LDFLAGS+=$(call check_ld,--reduce-memory-overheads,)
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#LIB_LDFLAGS+=$(call check_ld,--as-needed,)
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#LIB_LDFLAGS+=$(call check_ld,--warn-shared-textrel,)
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# Some nice architecture specific optimizations
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ifeq ($(strip $(TARGET_ARCH)),arm)
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OPTIMIZATION+=-fstrict-aliasing
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endif
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ifeq ($(strip $(TARGET_ARCH)),i386)
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OPTIMIZATION+=$(call check_gcc,-march=i386,)
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# gcc-4.0 and older seem to suffer from these
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ifneq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
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OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
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OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
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-malign-functions=0 -malign-jumps=0 -malign-loops=0)
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endif # gcc-4.0 and older
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# gcc-4.1 and beyond seem to benefit from these
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ifeq ($(strip $(shell [ $(CC_MAJOR) -ge 4 -a $(CC_MINOR) -ge 1 ] ; echo $$?)),0)
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# turn off flags which hurt -Os
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OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
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OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
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OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
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OPTIMIZATION+=$(call check_gcc,-fno-branch-count-reg,)
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endif # gcc-4.1 and beyond
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endif
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OPTIMIZATIONS:=$(OPTIMIZATION) $(call check_gcc,-fomit-frame-pointer,)
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#
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#--------------------------------------------------------
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# If you're going to do a lot of builds with a non-vanilla configuration,
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# it makes sense to adjust parameters above, so you can type "make"
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# by itself, instead of following it by the same half-dozen overrides
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# every time. The stuff below, on the other hand, is probably less
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# prone to casual user adjustment.
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#
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ifeq ($(strip $(CONFIG_LFS)),y)
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# For large file summit support
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CFLAGS+=-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
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endif
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ifeq ($(strip $(CONFIG_DMALLOC)),y)
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# For testing mem leaks with dmalloc
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CFLAGS+=-DDMALLOC
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LIBRARIES:=-ldmalloc
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else
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ifeq ($(strip $(CONFIG_EFENCE)),y)
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LIBRARIES:=-lefence
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endif
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endif
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ifeq ($(strip $(CONFIG_DEBUG)),y)
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CFLAGS +=$(WARNINGS) -g -D_GNU_SOURCE
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LDFLAGS += $(call check_ld,-warn-common,)
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STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
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else
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CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
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LDFLAGS += $(call check_ld,-warn-common,)
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LDFLAGS += $(call check_ld,--sort-common,)
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STRIPCMD:=$(STRIP) -s --remove-section=.note --remove-section=.comment
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endif
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ifeq ($(strip $(CONFIG_STATIC)),y)
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LDFLAGS += $(call check_ld,--static,)
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#else
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# LIBRARIES += -ldl
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endif
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ifeq ($(strip $(CONFIG_BUILD_LIBBUSYBOX)),y)
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CFLAGS_PIC:= $(call check_gcc,-fPIC,)
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endif
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ifeq ($(strip $(CONFIG_SELINUX)),y)
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LIBRARIES += -lselinux
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endif
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ifeq ($(strip $(PREFIX)),)
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PREFIX:=`pwd`/_install
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endif
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# Additional complications due to support for pristine source dir.
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# Include files in the build directory should take precedence over
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# the copy in top_srcdir, both during the compilation phase and the
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# shell script that finds the list of object files.
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# Work in progress by <ldoolitt@recycle.lbl.gov>.
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OBJECTS:=$(APPLET_SOURCES:.c=.o) busybox.o usage.o applets.o
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CFLAGS += $(CROSS_CFLAGS)
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ifdef BB_INIT_SCRIPT
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CFLAGS += -DINIT_SCRIPT='"$(BB_INIT_SCRIPT)"'
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endif
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# Put user-supplied flags at the end, where they
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# have a chance of winning.
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CFLAGS += $(CFLAGS_EXTRA)
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#------------------------------------------------------------
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# Installation options
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ifeq ($(strip $(CONFIG_INSTALL_APPLET_HARDLINKS)),y)
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INSTALL_OPTS=--hardlinks
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endif
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ifeq ($(strip $(CONFIG_INSTALL_APPLET_SYMLINKS)),y)
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INSTALL_OPTS=--symlinks
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endif
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ifeq ($(strip $(CONFIG_INSTALL_APPLET_DONT)),y)
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INSTALL_OPTS=
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endif
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.PHONY: dummy
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